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    <title>Document</title>
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    <script>
        // 数字后面带n就是 BigInt 数据类型
        let n = 2 ** 20
        console.log(BigInt( n ));
        console.log(BigInt( n + 1 ));
        console.log(BigInt( n + 2 ));
        console.log(BigInt( n + 3 ));

        
    </script>
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